New Jersey Nets' Kris Humphries (43) gets off a shot in front of Orlando Magic's Ryan Anderson (33) during the first half of an NBA basketball game, Friday, March 16, 2012 in Orlando, Fla. (AP Photo/John Raoux)

The Cavaliers were reportedly working as the "facilitator" in a possible Dwight Howard blockbuster trade involving the Orlando Magic and the Brooklyn Nets.

The Nets are desperately trying to enlist teams that have major salary-cap space. One of their calls went to the Cavs.

The Nets reportedly were trying to execute a sign-and-trade with power forward Kris Humphries going to the Cavs. The Cavs showed some interest if they could stockpile another first-round pick to add to their bulging arsenal.

A source said the holdup was the Nets wanted the Cavs to give them one of their first-round picks, which was a potential deal-breaker. Unless the Nets back off that demand, a source said, the Cavs could pull out of the talks.

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The Cavs have three potential first-round picks in the 2013 NBA draft, as well as two second-rounders. It's not out of the question they could get more.

The 6-foot-11, 275-pound Howard has longed to go to the Nets and play with point guard Deron Williams. Howard is scheduled to make $19 million this season.

In the proposed trade, the Nets would re-sign center Brook Lopez and send him to Orlando along with several first-round picks. The 6-9, 235-pound Humphries averaged 13.8 points and 11.0 rebounds last year with New Jersey.

If the 27-year-old Humphries was involved in a sign-and-trade, he'd have to sign at least a three-year deal. But only one of those years would have to be fully guaranteed. He would likely sign for about $8 million in 2012-13.